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Re: [PSUBS-MAILIST] Cylinder choice.
Hi All,
This leads to a question that has bothered me for a while.
Can one make a CO2 scrubber too effecient? Would it be harmful if in a
1 atm sub you scrubbed all the CO2 out of the air? You would be left N
and O2. Is that bad?
Does one need to have a CO2 sensor to turn off the scrubber if the CO2
levels get to low?
Regards,
Ray
> Date: Sun, 23 Mar 2003 18:34:35 -0800 (PST)
> From: Warren Greenway <opensourcesub@yahoo.com>
> Subject: Re: [PSUBS-MAILIST] Cylinder choice.
> To: personal_submersibles@psubs.org
>
> Just keep in mind that O2 becomes toxic under
> pressure.
> CO2 and CO levels must be held to a few percent, or
> you could black out or die. Go to www.dolphinscuba.com
> for books that describe air supplies for divers in
> detail.
>
> Warren.
>
> --- Pierre Poulin <pipo305@hotmail.com> wrote:
> > Thanks guys.
> >
> > Dan or Cartens or anybody else,
> >
> > If you can breath 1 hour with the air in the sub,
> > how long can you extend
> > that 1 hour with a scrubber system?
> >
> > Also, in my ambient sub. If I have 1 hour air at
> > 1atm, will I have 2 hour at
> > 2atm? 3 at 3atm, etc... since there is 2, 3 time the
> > amount of o2 in the
> > ambient air. Will I exhale 2, 3 time more co2?
> >
> > Maybe this is a good question for Herve?
> >
> > By the way, I found a perfect place to first try my
> > sub. It's a tank that is
> > 10 X 10 X 10 foot. The top is at floor level. I have
> > acces to a fork lift to
> > raise the sub if need be, I can adjust the water
> > level in the tank and the
> > water is at 30 deg C!!! Just want to share my
> > happiness with you guys...
> >
> > Thanks again!
> >
> > Pierre Poulin
> >
> >
> >
> >
> > >From: "Dan H." <JMachine@adelphia.net>
> > >Reply-To: personal_submersibles@psubs.org
> > >To: <personal_submersibles@psubs.org>
> > >Subject: Re: [PSUBS-MAILIST] Cylinder choice.
> > >Date: Sun, 23 Mar 2003 11:02:20 -0500
> > >
> > >Piere,
> > >
> > >You can't beat Carstans explanation. He's far more
> > experienced then I am.
> > >I've done some research but am still in the
> > building phase. I'm about 2/3
> > >done with my K-350.
> > >
> > >It does however have a snorkel like Carstan
> > mentioned on the conning tower
> > >for the purpose of breathing outside air as long as
> > possible while sealed
> > >in
> > >the sub. The snorkel has a float valve on the
> > outside and a ball valve on
> > >the inside to lock it off while submerged.
> > >
> > >I will carry supplemental O2 and a CO2 scrubber. I
> > may not carry a full 72
> > >hours supply though. Most of my diving, if not
> > all, will be in easy to
> > >reach places and not to any great depths. If that
> > changes I will add more.
> > >
> > >In a K-350 I am told that a planned surface and
> > venting every hour is
> > >advisable. The upper limit of a person surviving
> > is around five hours "AT
> > >REST." But who will actually be at REST if
> > entangled on the bottom?
> > >
> > >My sub also has a 2 inch flood valve to equalize
> > pressure and allow escape
> > >with a bail out bottle if the depth permits as a
> > last effort.
> > >
> > >Dan H.
> > >
> > >----- Original Message -----
> > >From: "Pierre Poulin" <pipo305@hotmail.com>
> > >To: <personal_submersibles@psubs.org>
> > >Sent: Saturday, March 22, 2003 9:41 PM
> > >Subject: Re: [PSUBS-MAILIST] Cylinder choice.
> > >
> > >
> > > > Hi Dan!
> > > >
> > > > You only breath the air that is inside the hull?
> > With only a scrubber
> > > > system? I presume your sub is a 1atm type. What
> > is the time you can be
> > >under
> > > > water?
> > > >
> > > > What about the 72 hours autonomy emergency
> > reserve?
> > > >
> > > > I always presumed that in 1atm sub there was a
> > constant flow of fresh
> > >air
> > > > comming in and a pump to blow out the excess
> > pressure.
> > > >
> > > > My sub is a dry ambient. Can I breath only the
> > air inside the hull once
> > >it
> > > > is equalized?
> > > >
> > > > Thank you very much. I know those questions are
> > very basic but I
> > > > misunderstood them from the beginning.
> > > >
> > > > Pierre Poulin
> > > >
> > > >
> > > >
> > > >
> > > > >From: "Dan H." <JMachine@adelphia.net>
> > > > >Reply-To: personal_submersibles@psubs.org
> > > > >To: <personal_submersibles@psubs.org>
> > > > >Subject: Re: [PSUBS-MAILIST] Cylinder choice.
> > > > >Date: Sat, 22 Mar 2003 19:50:54 -0500
> > > > >
> > > > >None for breathing air. If you bread out of a
> > cylinder you have to
> > >exhale
> > > > >within the hull, raising the internal pressure.
> > A small tank for
> > >emergency
> > > > >exit is a good idea though. While dived,
> > breath the air contained
> > >within
> > > > >the sub hull itself.
> > > > >
> > > > >I have two SCUBA tanks for blowing ballast.
> > One to use and one for
> > > > >reserve.
> > > > >
> > > > >Dan H.
> > > > >
> > > > >----- Original Message -----
> > > > >From: "Pierre Poulin" <pipo305@hotmail.com>
> > > > >To: <personal_submersibles@psubs.org>
> > > > >Sent: Saturday, March 22, 2003 9:49 AM
> > > > >Subject: [PSUBS-MAILIST] Cylinder choice.
> > > > >
> > > > >
> > > > > >
> > > > > > Hi gang!
> > > > > >
> > > > > > I would like to konw what kind of cylinders
> > you are using for
> > >breating
> > > > >air.
> > > > > >
> > > > > > Thanks.
> > > > > >
> > > > > > Pierre Poulin
> > > > > > "the ice is melting now!"
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> >
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